Headlight Leveling ECU Power Source Circuit

LIGHTING: LIGHTING SYSTEM: Headlight Leveling ECU Power Source Circuit
- Headlight Leveling ECU Power Source Circuit

DESCRIPTION

This circuit provides power to operate the headlight beam level control ECU.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. INSPECT IGNITION RELAY NO. 1

(a) Inspect IG1 relay continuity.





(1) Remove the IG1 relay from the instrument panel J/B.

(2) Measure the resistance according to the value(s) in the table below.

Standard resistance:





NG -- REPLACE IGNITION RELAY NO. 1
OK -- Continue to next step.

2. INSPECT HEADLIGHT BEAM LEVEL CONTROL ECU

(a) Measure the voltage according to the value(s) in the table below.





Standard voltage:





NG -- CHECK HARNESS AND CONNECTOR (BATTERY - HEADLIGHT BEAM LEVEL CONTROL ECU)

OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

3. CHECK HARNESS AND CONNECTOR (BATTERY - HEADLIGHT BEAM LEVEL CONTROL ECU)

(a) Disconnect connector A21 of the headlight beam level control ECU.

(b) Measure the voltage according to the value(s) in the table below.

Standard voltage:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

4. CHECK HARNESS AND CONNECTOR (HEADLIGHT BEAM LEVEL CONTROL ECU - BODY GROUND)

(a) Measure the resistance according to the value(s) in the table below.

Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE